Metal-melting furnace.



W. SCOTT, DBCD. I. a D. J. sooTT, ExzcUToBs. METAL MELTING FURNAGE.

APPLIUATIoN num M125, 190s.

.W/T/VESSES W. SCOTT, DBCD. I. .E D. J. soo'TT,.r:xBoUTo1s. METAL MBLTING- FURNAGE.

APPLIOATION FILED JAN. 25, 1908.

Patented Dec. 2o, 1910.

3 SHEETS-SHEET 2.

A TTOHNEY W. SCOTT, DBCD.

I. b D. J. soofrT, BxnoUToRs.

METAL MELTING PUBNAGE.

APPLIoATIoN FILED nnss. 190s.'

,Patented Dec.20, 1910.

3 SHEETS-SHEET 3.

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AITOHNEY www the invention.

UNITED sTATEs PATENT oEEioE.

` ISABELLA SCOTT AND DAVID J. SCOTT, 0F PLAINFIELD, NEVIn JERSEY, EXECUTORS OF WALTER SCOTT, DECEASED.

METAL-MELTING FURNACE.

Specification of Letters Patent.

Application led January 25, 1908.

To all whom it may concer/n: s

Be it known that WALTER SCOTT, a citizen of the United` States, and late of Plainfield, Union county, New Jersey, did invent certain new and useful Improvements in Metal-Melting Furnaces, of which the following is a speciication.

The present invention relates generally to metal melting furnaces, and has more particularly reference to a metal melting furnace used in connection with stereotyping apparatus.

The chief object of the invention is to keep the metalhot while pumping it out of the melting ot and to enable metal to be drawn out rea ily even when there is a comparatively low level of molten metal in the melting pot.

To this end the invention consists chieiiy in providing the melting pot with a pocket preferably extending below the normal level of the bottom wall of the melt-ing pot, and in supporting a pump cylinder in line with the said pocket and extending into the same in such a manner that the said cylinder is free from contact with the walls of the melting pot and pocket. l

Other features of construction will appear as the specification roceeds.

In the accompanying drawings the invention is embodied in a concrete and preferred form, but changes of construction may of course be made without departing from the legitimate and intended scope of the invention.

In the said drawings :-Figure 1 is a side elevation, partly broken away and in section, of a metal melting furnace embodying Fig., 2 is a plan view, also partly broken away and in section of the furnace. Fig. 3 is a detail view of the melting pot, also partly in section.

Similar characters of reference indicate corresponding parts in the several views.

1 indicates a metal melting furnace of any suitable construction, 2 is the melting pot, and 3 represents a stereotype casting mold which may be used in connection with the furnace.

The melting pot is preferably semi-spherical in shape and rests on top of the furnace by means of the circumferential flange 4. This pot is provided with a pocket 5 extending below its normal bottom Wall `6. This pocket is preferably cylindrical in shape.

cylinder and conduit are in communication with each other at their lower end -b v means of the passage 11, and are suspended in line with the pocket 5 and extend thereinto, without, however, coming in contact with the walls of the pot and pocket.. This enables the hot metal to surround the said cylinder and conduit thereby tending to keep the Inetal within the same in iiuid condition. Also when the level of the metal in the pot is low it will still iiow into the cylinder' since the pocket is below the normal bottom wall ofthe pot. The cylinder communicates with the melting pot by means of the passages 12.

Working in the cylinder is a piston 13 which may be operated in any suitable manner, as by means of the piston rod 14, bifurcated arm 15, rockshaft 16 andlever 17. The piston is provided with the ball valves 18 which open on the upstroke so as to relieve the partial vacuum produced in the cylinder.

Supported by. the member 8 is the spout 19 which is in line with the conduit 1Q. This spout 19 is composed of two portions 20 and 21 inclined 1n opposite directions from a common high point 22 so that the metal will flow in both directions.

In the construction disclosed there 'are two pockets 5 and two members 8 etc; but as both arrangements are alike it is unnecessary 'to describe more than one.

When the lever 17 is operated the piston 13 will descend thereby closing the passages 12 ofthe cylinder 9 and forcing the molten metal through the passage 11 into the conduit 10, up through the spout 19, and past. the high point- 22 thereof. The metal remaining in the spout below the high point 22 will return to the cylinder when the piston moves up.

What is claimed is 1. In a metal melting furnace, a melting pot having a pocket extending below its normal bottom wall, a spout/at the upper end of the furnace, a pump cylinder having Aan upwardly extending conduiton its exterior wall, said conduit communicating with the spout and cylinder, and said cylinder being in line with the pocket so as to extend into the same and suspended so as to be free from Contact with' the walls of the melting pot and pocket, and a piston operating in said cylinder.

2. In a metal melting furnace, a melting pot supported at the upper end of the furnace by means of a circumferential flange, a cross piece extending over the top of the melting pot and resting on the flange thereof. a member forming a pump cylinder and an exterior and vertically extending conduit communirating with the lower end of the said cylinder', said member being` secured to the flange of the melting pot and to the cross piece aforesaid, a spout in line with the vertically extending conduit supported by the member aforesaid, and a piston operating in the said pump cylinder.

In combination with a melting furnace. a semi-spherical meltingpot, a portion of the annular wall of the pot being continued straight downward and the bottom wall of the pot being continued downward below the normal bottom, so as to form in combination with the straight portion of the wall, a cylindrical pocket of a lower level than the normal bottom of the pot, and a cylindrical pump suspended so as to hang in the cylindrical pocket of the pot, said pump having a vertically extending conduit arranged parallel to the vertical portion of the wall of the pot, and a spout in communica` tion with said conduit.

4. In a metal melting furnace, a semi-A spherical melting pot having oppositely disposed cylindrical pockets in the bottom thereof, a cross piece extending across the pot, pumps on opposite sides of the cross piece suspended between said cross piece and the rim of the pot, so as to hang in the cylindrical pockets aforesaid, said pumps having each aV vertically extending conduit, and spouts in communication with the conduits of the pumps.

5. In a metal melting furnace, a semispherical melting pot, a cross piece extendu ing across and resting upon the rim of the pot, portions of the annular wall of the pot., on opposite sides of the cross piece, being continued straight downward and the bottom wall of the pot being lowered below the normal bottom so as to form in combination with the straight portions of the wall, cy'- lindrical pockets located on opposite sidesl of the cross piece and of a lower level than the normal bottom of the pot, pumps on opposi te sides of the cross piece suspended between said cross piece and the rim of the pot so as to hang in the cylindrical pockets aforesaid, said pumps each having a vertically extending conduit on the exterior wall thereof located parallel and closely adjacent to the straight portions of the side walls of the pot, and spouts on top of the cylinders in communication with the conduits of the pumps.

Signed at Plainiield, Union county, New Jersey, this sixth day of January, 1908.

A ISABELLA SCOTT,

DAVID J. SCOTT, Ea'ccutors of the estate of Walter Scott. Witnesses AXEL V. BEEKEN, It. L. I'IILnoRN. 

